xref: /netbsd-src/sys/fs/cd9660/cd9660_rrip.c (revision e5548b402ae4c44fb816de42c7bba9581ce23ef5)
1 /*	$NetBSD: cd9660_rrip.c,v 1.9 2005/12/11 12:24:25 christos Exp $	*/
2 
3 /*-
4  * Copyright (c) 1993, 1994
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley
8  * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
9  * Support code is derived from software contributed to Berkeley
10  * by Atsushi Murai (amurai@spec.co.jp).
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  * 3. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  *
36  *	@(#)cd9660_rrip.c	8.6 (Berkeley) 12/5/94
37  */
38 
39 #include <sys/cdefs.h>
40 __KERNEL_RCSID(0, "$NetBSD: cd9660_rrip.c,v 1.9 2005/12/11 12:24:25 christos Exp $");
41 
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/namei.h>
45 #include <sys/buf.h>
46 #include <sys/file.h>
47 #include <sys/vnode.h>
48 #include <sys/mount.h>
49 #include <sys/kernel.h>
50 #include <sys/stat.h>
51 
52 #include <sys/time.h>
53 
54 #include <fs/cd9660/iso.h>
55 #include <fs/cd9660/cd9660_extern.h>
56 #include <fs/cd9660/cd9660_node.h>
57 #include <fs/cd9660/cd9660_rrip.h>
58 #include <fs/cd9660/iso_rrip.h>
59 
60 typedef struct {
61 	char type[2];
62 	int (*func)(void *, ISO_RRIP_ANALYZE *);
63 	void (*func2)(void *, ISO_RRIP_ANALYZE *);
64 	int result;
65 } RRIP_TABLE;
66 
67 static int cd9660_rrip_attr(void *, ISO_RRIP_ANALYZE *);
68 static void cd9660_rrip_defattr(void *, ISO_RRIP_ANALYZE *);
69 static int cd9660_rrip_slink(void *, ISO_RRIP_ANALYZE *);
70 static int cd9660_rrip_altname(void *, ISO_RRIP_ANALYZE *);
71 static void cd9660_rrip_defname(void *, ISO_RRIP_ANALYZE *);
72 static int cd9660_rrip_pclink(void *, ISO_RRIP_ANALYZE *);
73 static int cd9660_rrip_reldir(void *, ISO_RRIP_ANALYZE *);
74 static int cd9660_rrip_tstamp(void *, ISO_RRIP_ANALYZE *);
75 static void cd9660_rrip_deftstamp(void *, ISO_RRIP_ANALYZE *);
76 static int cd9660_rrip_device(void *, ISO_RRIP_ANALYZE *);
77 static int cd9660_rrip_idflag(void *, ISO_RRIP_ANALYZE *);
78 static int cd9660_rrip_cont(void *, ISO_RRIP_ANALYZE *);
79 static int cd9660_rrip_stop(void *, ISO_RRIP_ANALYZE *);
80 static int cd9660_rrip_extref(void *, ISO_RRIP_ANALYZE *);
81 static int cd9660_rrip_loop(struct iso_directory_record *,
82 				 ISO_RRIP_ANALYZE *, const RRIP_TABLE *);
83 /*
84  * POSIX file attribute
85  */
86 static int
87 cd9660_rrip_attr(v, ana)
88 	void *v;
89 	ISO_RRIP_ANALYZE *ana;
90 {
91 	ISO_RRIP_ATTR *p = v;
92 
93 	ana->inop->inode.iso_mode = isonum_733(p->mode);
94 	ana->inop->inode.iso_uid = isonum_733(p->uid);
95 	ana->inop->inode.iso_gid = isonum_733(p->gid);
96 	ana->inop->inode.iso_links = isonum_733(p->links);
97 	ana->fields &= ~ISO_SUSP_ATTR;
98 	return ISO_SUSP_ATTR;
99 }
100 
101 static void
102 cd9660_rrip_defattr(v, ana)
103 	void *v;
104 	ISO_RRIP_ANALYZE *ana;
105 {
106 	struct iso_directory_record *isodir = v;
107 
108 	/* But this is a required field! */
109 	printf("RRIP without PX field?\n");
110 	cd9660_defattr(isodir, ana->inop, NULL);
111 }
112 
113 /*
114  * Symbolic Links
115  */
116 static int
117 cd9660_rrip_slink(v, ana)
118 	void *v;
119 	ISO_RRIP_ANALYZE *ana;
120 {
121 	ISO_RRIP_SLINK  *p = v;
122 	ISO_RRIP_SLINK_COMPONENT *pcomp;
123 	ISO_RRIP_SLINK_COMPONENT *pcompe;
124 	int len, wlen, cont;
125 	char *outbuf;
126 	const char *inbuf;
127 
128 	pcomp = (ISO_RRIP_SLINK_COMPONENT *)p->component;
129 	pcompe = (ISO_RRIP_SLINK_COMPONENT *)
130 		((char *)p + isonum_711(p->h.length));
131 	len = *ana->outlen;
132 	outbuf = ana->outbuf;
133 	cont = ana->cont;
134 
135 	/*
136 	 * Gathering a Symbolic name from each component with path
137 	 */
138 	for (;
139 	     pcomp < pcompe;
140 	     pcomp = (ISO_RRIP_SLINK_COMPONENT *)((char *)pcomp + ISO_RRIP_SLSIZ
141 						  + isonum_711(pcomp->clen))) {
142 
143 		if (!cont) {
144 			if (len < ana->maxlen) {
145 				len++;
146 				*outbuf++ = '/';
147 			}
148 		}
149 		cont = 0;
150 
151 		inbuf = "..";
152 		wlen = 0;
153 
154 		switch (*pcomp->cflag) {
155 
156 		case ISO_SUSP_CFLAG_CURRENT:
157 			/* Inserting Current */
158 			wlen = 1;
159 			break;
160 
161 		case ISO_SUSP_CFLAG_PARENT:
162 			/* Inserting Parent */
163 			wlen = 2;
164 			break;
165 
166 		case ISO_SUSP_CFLAG_ROOT:
167 			/* Inserting slash for ROOT */
168 			/* start over from beginning(?) */
169 			outbuf -= len;
170 			len = 0;
171 			break;
172 
173 		case ISO_SUSP_CFLAG_VOLROOT:
174 			/* Inserting a mount point i.e. "/cdrom" */
175 			/* same as above */
176 			outbuf -= len;
177 			len = 0;
178 			inbuf = ana->imp->im_mountp->mnt_stat.f_mntonname;
179 			wlen = strlen(inbuf);
180 			break;
181 
182 		case ISO_SUSP_CFLAG_HOST:
183 			/* Inserting hostname i.e. "kurt.tools.de" */
184 			inbuf = hostname;
185 			wlen = hostnamelen;
186 			break;
187 
188 		case ISO_SUSP_CFLAG_CONTINUE:
189 			cont = 1;
190 			/* fall thru */
191 		case 0:
192 			/* Inserting component */
193 			wlen = isonum_711(pcomp->clen);
194 			inbuf = pcomp->name;
195 			break;
196 		default:
197 			printf("RRIP with incorrect flags?");
198 			wlen = ana->maxlen + 1;
199 			break;
200 		}
201 
202 		if (len + wlen > ana->maxlen) {
203 			/* indicate error to caller */
204 			ana->cont = 1;
205 			ana->fields = 0;
206 			ana->outbuf -= *ana->outlen;
207 			*ana->outlen = 0;
208 			return 0;
209 		}
210 
211 		memcpy(outbuf, inbuf, wlen);
212 		outbuf += wlen;
213 		len += wlen;
214 	}
215 	ana->outbuf = outbuf;
216 	*ana->outlen = len;
217 	ana->cont = cont;
218 
219 	if (!isonum_711(p->flags)) {
220 		ana->fields &= ~ISO_SUSP_SLINK;
221 		return ISO_SUSP_SLINK;
222 	}
223 	return 0;
224 }
225 
226 /*
227  * Alternate name
228  */
229 static int
230 cd9660_rrip_altname(v, ana)
231 	void *v;
232 	ISO_RRIP_ANALYZE *ana;
233 {
234 	ISO_RRIP_ALTNAME *p = v;
235 	const char *inbuf;
236 	int wlen;
237 	int cont;
238 
239 	inbuf = "..";
240 	wlen = 0;
241 	cont = 0;
242 
243 	switch (*p->flags) {
244 	case ISO_SUSP_CFLAG_CURRENT:
245 		/* Inserting Current */
246 		wlen = 1;
247 		break;
248 
249 	case ISO_SUSP_CFLAG_PARENT:
250 		/* Inserting Parent */
251 		wlen = 2;
252 		break;
253 
254 	case ISO_SUSP_CFLAG_HOST:
255 		/* Inserting hostname i.e. "kurt.tools.de" */
256 		inbuf = hostname;
257 		wlen = hostnamelen;
258 		break;
259 
260 	case ISO_SUSP_CFLAG_CONTINUE:
261 		cont = 1;
262 		/* fall thru */
263 	case 0:
264 		/* Inserting component */
265 		wlen = isonum_711(p->h.length) - 5;
266 		inbuf = (char *)p + 5;
267 		break;
268 
269 	default:
270 		printf("RRIP with incorrect NM flags?\n");
271 		wlen = ana->maxlen + 1;
272 		break;
273 	}
274 
275 	if ((*ana->outlen += wlen) > ana->maxlen) {
276 		/* treat as no name field */
277 		ana->fields &= ~ISO_SUSP_ALTNAME;
278 		ana->outbuf -= *ana->outlen - wlen;
279 		*ana->outlen = 0;
280 		return 0;
281 	}
282 
283 	memcpy(ana->outbuf, inbuf, wlen);
284 	ana->outbuf += wlen;
285 
286 	if (!cont) {
287 		ana->fields &= ~ISO_SUSP_ALTNAME;
288 		return ISO_SUSP_ALTNAME;
289 	}
290 	return 0;
291 }
292 
293 static void
294 cd9660_rrip_defname(v, ana)
295 	void *v;
296 	ISO_RRIP_ANALYZE *ana;
297 {
298 	struct iso_directory_record *isodir = v;
299 
300 	isofntrans(isodir->name, isonum_711(isodir->name_len),
301 		   ana->outbuf, ana->outlen,
302 		   1, 0, isonum_711(isodir->flags) & 4,
303 		   ana->imp->im_joliet_level);
304 	switch (ana->outbuf[0]) {
305 	default:
306 		break;
307 	case 0:
308 		ana->outbuf[0] = '.';
309 		*ana->outlen = 1;
310 		break;
311 	case 1:
312 		strlcpy(ana->outbuf, "..", ana->maxlen - *ana->outlen);
313 		*ana->outlen = 2;
314 		break;
315 	}
316 }
317 
318 /*
319  * Parent or Child Link
320  */
321 static int
322 cd9660_rrip_pclink(v, ana)
323 	void *v;
324 	ISO_RRIP_ANALYZE *ana;
325 {
326 	ISO_RRIP_CLINK  *p = v;
327 
328 	*ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift;
329 	ana->fields &= ~(ISO_SUSP_CLINK | ISO_SUSP_PLINK);
330 	return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK;
331 }
332 
333 /*
334  * Relocated directory
335  */
336 /*ARGSUSED*/
337 static int
338 cd9660_rrip_reldir(v, ana)
339 	void *v;
340 	ISO_RRIP_ANALYZE *ana;
341 {
342 	/* special hack to make caller aware of RE field */
343 	*ana->outlen = 0;
344 	ana->fields = 0;
345 	return ISO_SUSP_RELDIR | ISO_SUSP_ALTNAME
346 	    | ISO_SUSP_CLINK | ISO_SUSP_PLINK;
347 }
348 
349 static int
350 cd9660_rrip_tstamp(v, ana)
351 	void *v;
352 	ISO_RRIP_ANALYZE *ana;
353 {
354 	ISO_RRIP_TSTAMP *p = v;
355 	u_char *ptime;
356 
357 	ptime = p->time;
358 
359 	/* Check a format of time stamp (7bytes/17bytes) */
360 	if (!(*p->flags & ISO_SUSP_TSTAMP_FORM17)) {
361 		if (*p->flags & ISO_SUSP_TSTAMP_CREAT)
362 			ptime += 7;
363 
364 		if (*p->flags & ISO_SUSP_TSTAMP_MODIFY) {
365 			cd9660_tstamp_conv7(ptime, &ana->inop->inode.iso_mtime);
366 			ptime += 7;
367 		} else
368 			memset(&ana->inop->inode.iso_mtime, 0, sizeof(struct timespec));
369 
370 		if (*p->flags & ISO_SUSP_TSTAMP_ACCESS) {
371 			cd9660_tstamp_conv7(ptime, &ana->inop->inode.iso_atime);
372 			ptime += 7;
373 		} else
374 			ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
375 
376 		if (*p->flags & ISO_SUSP_TSTAMP_ATTR)
377 			cd9660_tstamp_conv7(ptime, &ana->inop->inode.iso_ctime);
378 		else
379 			ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
380 
381 	} else {
382 		if (*p->flags & ISO_SUSP_TSTAMP_CREAT)
383 			ptime += 17;
384 
385 		if (*p->flags & ISO_SUSP_TSTAMP_MODIFY) {
386 			cd9660_tstamp_conv17(ptime, &ana->inop->inode.iso_mtime);
387 			ptime += 17;
388 		} else
389 			memset(&ana->inop->inode.iso_mtime, 0, sizeof(struct timespec));
390 
391 		if (*p->flags & ISO_SUSP_TSTAMP_ACCESS) {
392 			cd9660_tstamp_conv17(ptime, &ana->inop->inode.iso_atime);
393 			ptime += 17;
394 		} else
395 			ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
396 
397 		if (*p->flags & ISO_SUSP_TSTAMP_ATTR)
398 			cd9660_tstamp_conv17(ptime, &ana->inop->inode.iso_ctime);
399 		else
400 			ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
401 
402 	}
403 	ana->fields &= ~ISO_SUSP_TSTAMP;
404 	return ISO_SUSP_TSTAMP;
405 }
406 
407 static void
408 cd9660_rrip_deftstamp(v, ana)
409 	void *v;
410 	ISO_RRIP_ANALYZE *ana;
411 {
412 	struct iso_directory_record  *isodir = v;
413 
414 	cd9660_deftstamp(isodir, ana->inop, NULL);
415 }
416 
417 /*
418  * POSIX device modes
419  */
420 static int
421 cd9660_rrip_device(v, ana)
422 	void *v;
423 	ISO_RRIP_ANALYZE *ana;
424 {
425 	ISO_RRIP_DEVICE *p = v;
426 	u_int high, low;
427 
428 	high = isonum_733(p->dev_t_high);
429 	low  = isonum_733(p->dev_t_low);
430 
431 	if (high == 0)
432 		ana->inop->inode.iso_rdev = makedev(major(low), minor(low));
433 	else
434 		ana->inop->inode.iso_rdev = makedev(high, minor(low));
435 	ana->fields &= ~ISO_SUSP_DEVICE;
436 	return ISO_SUSP_DEVICE;
437 }
438 
439 /*
440  * Flag indicating
441  */
442 static int
443 cd9660_rrip_idflag(v, ana)
444 	void *v;
445 	ISO_RRIP_ANALYZE *ana;
446 {
447 	ISO_RRIP_IDFLAG *p = v;
448 
449 	ana->fields &= isonum_711(p->flags) | ~0xff; /* don't touch high bits */
450 	/* special handling of RE field */
451 	if (ana->fields & ISO_SUSP_RELDIR)
452 		return cd9660_rrip_reldir(p, ana);
453 
454 	return ISO_SUSP_IDFLAG;
455 }
456 
457 /*
458  * Continuation pointer
459  */
460 static int
461 cd9660_rrip_cont(v, ana)
462 	void *v;
463 	ISO_RRIP_ANALYZE *ana;
464 {
465 	ISO_RRIP_CONT *p = v;
466 
467 	ana->iso_ce_blk = isonum_733(p->location);
468 	ana->iso_ce_off = isonum_733(p->offset);
469 	ana->iso_ce_len = isonum_733(p->length);
470 	return ISO_SUSP_CONT;
471 }
472 
473 /*
474  * System Use end
475  */
476 static int
477 cd9660_rrip_stop(v, ana)
478 	void *v;
479 	ISO_RRIP_ANALYZE *ana;
480 {
481 	return ISO_SUSP_STOP;
482 }
483 
484 /*
485  * Extension reference
486  */
487 static int
488 cd9660_rrip_extref(v, ana)
489 	void *v;
490 	ISO_RRIP_ANALYZE *ana;
491 {
492 	ISO_RRIP_EXTREF *p = v;
493 
494 	if (isonum_711(p->version) != 1)
495 		return 0;
496 	if (isonum_711(p->len_id) != 9
497 	    && isonum_711(p->len_id) != 10)
498 		return 0;
499 	if (isonum_711(p->len_id) == 9
500 	    && memcmp((char *)p + 8, "IEEE_1282", 9))
501 		return 0;
502 	if (isonum_711(p->len_id) == 10
503 	    && memcmp((char *)p + 8, "IEEE_P1282", 10)
504 	    && memcmp((char *)p + 8, "RRIP_1991A", 10))
505 		return 0;
506 	ana->fields &= ~ISO_SUSP_EXTREF;
507 	return ISO_SUSP_EXTREF;
508 }
509 
510 
511 static int
512 cd9660_rrip_loop(isodir, ana, table)
513 	struct iso_directory_record *isodir;
514 	ISO_RRIP_ANALYZE *ana;
515 	const RRIP_TABLE *table;
516 {
517 	const RRIP_TABLE *ptable;
518 	ISO_SUSP_HEADER *phead;
519 	ISO_SUSP_HEADER *pend;
520 	struct buf *bp = NULL;
521 	char *pwhead;
522 	u_int16_t c;
523 	int result;
524 
525 	/*
526 	 * Note: If name length is odd,
527 	 *       it will be padded by 1 byte after the name
528 	 */
529 	pwhead = isodir->name + isonum_711(isodir->name_len);
530 	if (!(isonum_711(isodir->name_len) & 1))
531 		pwhead++;
532 	isochar(isodir->name, pwhead, ana->imp->im_joliet_level, &c);
533 
534 	/* If it's not the '.' entry of the root dir obey SP field */
535 	if (c != 0 || isonum_733(isodir->extent) != ana->imp->root_extent)
536 		pwhead += ana->imp->rr_skip;
537 	else
538 		pwhead += ana->imp->rr_skip0;
539 
540 	phead = (ISO_SUSP_HEADER *)pwhead;
541 	pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length));
542 
543 	result = 0;
544 	while (1) {
545 		ana->iso_ce_len = 0;
546 		/*
547 		 * Note: "pend" should be more than one SUSP header
548 		 */
549 		while (pend >= phead + 1) {
550 			if (isonum_711(phead->version) == 1) {
551 				for (ptable = table; ptable->func; ptable++) {
552 					if (*phead->type == *ptable->type
553 					    && phead->type[1] == ptable->type[1]) {
554 						result |= ptable->func(phead, ana);
555 						break;
556 					}
557 				}
558 				if (!ana->fields)
559 					break;
560 			}
561 			if (result & ISO_SUSP_STOP) {
562 				result &= ~ISO_SUSP_STOP;
563 				break;
564 			}
565 			/* plausibility check */
566 			if (isonum_711(phead->length) < sizeof(*phead))
567 				break;
568 			/*
569 			 * move to next SUSP
570 			 * Hopefully this works with newer versions, too
571 			 */
572 			phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length));
573 		}
574 
575 		if (ana->fields && ana->iso_ce_len) {
576 			if (ana->iso_ce_blk >= ana->imp->volume_space_size
577 			    || ana->iso_ce_off + ana->iso_ce_len > ana->imp->logical_block_size
578 			    || bread(ana->imp->im_devvp,
579 				     ana->iso_ce_blk << (ana->imp->im_bshift - DEV_BSHIFT),
580 				     ana->imp->logical_block_size, NOCRED, &bp))
581 				/* what to do now? */
582 				break;
583 			phead = (ISO_SUSP_HEADER *)(bp->b_data + ana->iso_ce_off);
584 			pend = (ISO_SUSP_HEADER *)((char *)phead + ana->iso_ce_len);
585 		} else
586 			break;
587 	}
588 	if (bp)
589 		brelse(bp);
590 	/*
591 	 * If we don't find the Basic SUSP stuffs, just set default value
592 	 *   (attribute/time stamp)
593 	 */
594 	for (ptable = table; ptable->func2; ptable++)
595 		if (!(ptable->result & result))
596 			ptable->func2(isodir, ana);
597 
598 	return result;
599 }
600 
601 /*
602  * Get Attributes.
603  */
604 static const RRIP_TABLE rrip_table_analyze[] = {
605 	{ "PX", cd9660_rrip_attr,	cd9660_rrip_defattr,	ISO_SUSP_ATTR },
606 	{ "TF", cd9660_rrip_tstamp,	cd9660_rrip_deftstamp,	ISO_SUSP_TSTAMP },
607 	{ "PN", cd9660_rrip_device,	0,			ISO_SUSP_DEVICE },
608 	{ "RR", cd9660_rrip_idflag,	0,			ISO_SUSP_IDFLAG },
609 	{ "CE", cd9660_rrip_cont,	0,			ISO_SUSP_CONT },
610 	{ "ST", cd9660_rrip_stop,	0,			ISO_SUSP_STOP },
611 	{ "",	0,			0,			0 }
612 };
613 
614 int
615 cd9660_rrip_analyze(isodir, inop, imp)
616 	struct iso_directory_record *isodir;
617 	struct iso_node *inop;
618 	struct iso_mnt *imp;
619 {
620 	ISO_RRIP_ANALYZE analyze;
621 
622 	analyze.inop = inop;
623 	analyze.imp = imp;
624 	analyze.fields = ISO_SUSP_ATTR | ISO_SUSP_TSTAMP | ISO_SUSP_DEVICE;
625 
626 	return cd9660_rrip_loop(isodir, &analyze, rrip_table_analyze);
627 }
628 
629 /*
630  * Get Alternate Name.
631  */
632 static const RRIP_TABLE rrip_table_getname[] = {
633 	{ "NM", cd9660_rrip_altname,	cd9660_rrip_defname,	ISO_SUSP_ALTNAME },
634 	{ "CL", cd9660_rrip_pclink,	0,			ISO_SUSP_CLINK|ISO_SUSP_PLINK },
635 	{ "PL", cd9660_rrip_pclink,	0,			ISO_SUSP_CLINK|ISO_SUSP_PLINK },
636 	{ "RE", cd9660_rrip_reldir,	0,			ISO_SUSP_RELDIR },
637 	{ "RR", cd9660_rrip_idflag,	0,			ISO_SUSP_IDFLAG },
638 	{ "CE", cd9660_rrip_cont,	0,			ISO_SUSP_CONT },
639 	{ "ST", cd9660_rrip_stop,	0,			ISO_SUSP_STOP },
640 	{ "",	0,			0,			0 }
641 };
642 
643 int
644 cd9660_rrip_getname(isodir, outbuf, outlen, inump, imp)
645 	struct iso_directory_record *isodir;
646 	char *outbuf;
647 	u_short *outlen;
648 	ino_t *inump;
649 	struct iso_mnt *imp;
650 {
651 	ISO_RRIP_ANALYZE analyze;
652 	const RRIP_TABLE *tab;
653 	u_int16_t c;
654 
655 	analyze.outbuf = outbuf;
656 	analyze.outlen = outlen;
657 	analyze.maxlen = NAME_MAX;
658 	analyze.inump = inump;
659 	analyze.imp = imp;
660 	analyze.fields = ISO_SUSP_ALTNAME | ISO_SUSP_RELDIR | ISO_SUSP_CLINK | ISO_SUSP_PLINK;
661 	*outlen = 0;
662 
663 	isochar(isodir->name, isodir->name + isonum_711(isodir->name_len),
664 		imp->im_joliet_level, &c);
665 	tab = rrip_table_getname;
666 	if (c == 0 || c == 1) {
667 		cd9660_rrip_defname(isodir, &analyze);
668 
669 		analyze.fields &= ~ISO_SUSP_ALTNAME;
670 		tab++;
671 	}
672 
673 	return cd9660_rrip_loop(isodir, &analyze, tab);
674 }
675 
676 /*
677  * Get Symbolic Link.
678  */
679 static const RRIP_TABLE rrip_table_getsymname[] = {
680 	{ "SL", cd9660_rrip_slink,	0,			ISO_SUSP_SLINK },
681 	{ "RR", cd9660_rrip_idflag,	0,			ISO_SUSP_IDFLAG },
682 	{ "CE", cd9660_rrip_cont,	0,			ISO_SUSP_CONT },
683 	{ "ST", cd9660_rrip_stop,	0,			ISO_SUSP_STOP },
684 	{ "",	0,			0,			0 }
685 };
686 
687 int
688 cd9660_rrip_getsymname(isodir, outbuf, outlen, imp)
689 	struct iso_directory_record *isodir;
690 	char *outbuf;
691 	u_short *outlen;
692 	struct iso_mnt *imp;
693 {
694 	ISO_RRIP_ANALYZE analyze;
695 
696 	analyze.outbuf = outbuf;
697 	analyze.outlen = outlen;
698 	*outlen = 0;
699 	analyze.maxlen = MAXPATHLEN;
700 	analyze.cont = 1;		/* don't start with a slash */
701 	analyze.imp = imp;
702 	analyze.fields = ISO_SUSP_SLINK;
703 
704 	return cd9660_rrip_loop(isodir, &analyze, rrip_table_getsymname) & ISO_SUSP_SLINK;
705 }
706 
707 static const RRIP_TABLE rrip_table_extref[] = {
708 	{ "ER", cd9660_rrip_extref,	0,	ISO_SUSP_EXTREF },
709 	{ "CE", cd9660_rrip_cont,	0,	ISO_SUSP_CONT },
710 	{ "ST", cd9660_rrip_stop,	0,	ISO_SUSP_STOP },
711 	{ "",	0,			0,	0 }
712 };
713 
714 /*
715  * Check for Rock Ridge Extension and return offset of its fields.
716  * Note: We insist on the ER field.
717  */
718 int
719 cd9660_rrip_offset(isodir, imp)
720 	struct iso_directory_record *isodir;
721 	struct iso_mnt *imp;
722 {
723 	ISO_RRIP_OFFSET *p;
724 	ISO_RRIP_ANALYZE analyze;
725 
726 	imp->rr_skip0 = 0;
727 	p = (ISO_RRIP_OFFSET *)(isodir->name + 1);
728 	if (memcmp(p, "SP\7\1\276\357", 6)) {
729 		/* Maybe, it's a CDROM XA disc? */
730 		imp->rr_skip0 = 15;
731 		p = (ISO_RRIP_OFFSET *)((char *)p + 15);
732 		if (memcmp(p, "SP\7\1\276\357", 6))
733 			return -1;
734 	}
735 
736 	analyze.imp = imp;
737 	analyze.fields = ISO_SUSP_EXTREF;
738 	if (!(cd9660_rrip_loop(isodir, &analyze, rrip_table_extref) & ISO_SUSP_EXTREF))
739 		return -1;
740 
741 	return isonum_711(p->skip);
742 }
743